THREE-LINK LOCKING DEVICE WITH CAM Russian patent published in 2020 - IPC E05B27/00 

FIELD: locks.

SUBSTANCE: invention - three-link locking device with master, used as central, and end attachable lock, locking from outside movement of lock locking plate only from position is closed. Locking device consists of fixed platform (1), fixed on door inner side, on which locking bar (3) is located and its displacement mechanism, on which a cylindrical housing is located, in the cavity of which there is a key plate, consisting of three segments, adjacent to each other with adjacent planes and having coaxial channels, in which there are pushers (7) and retainers cylindrical bodies, dropped on key plate by spring-loaded release cylinder (9). Tail part of the central segment of the key plate is able to engage with locking bar (3) through stopper (11) moving along console-cam (15) attached to locking plate (3) at right angle, with the possibility of forced movement of stopper (11) along console-cam (15) upwards and its attachment to the upper horizontal path of console-cam (15), which enables locking bar (3) to freely move, as well as with possibility of its falling along the vertical path of console-cam (15) down under the action of the pusher thrusting against it from the side of the opposite movement of locking plate (3), due to which, at the end of the fall along the vertical path of console-cam (15), it rests against the tail part of the central segment of the key plate, which moves locking plate (3) into the locked position at the moment of locking the device both on the left and on the right.

EFFECT: high secrecy, resistance to break-in, reliability and durability, with free movement of the locking bar from the inside.

1 cl, 2 dwg